Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.19-3.235.00-5.30
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
{110} good
None, may show partings on {0001} and {10 1 1}
Mohs Hardness
5-66
2
10
👆🏻
Chemical Composition
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
Fe 2O 3Arthur Thomas , Gemstones (2009)